Carburetor



R. MALEN CARBURETOR lun@ 28%, 1932.

Filed 001;. 19, 1929 Patented June 28, 1932 narra! l armas tatamiy Param' ori-noa RICHARD MALIN, OF CHEMNITZ, GERMANY, .ASSIGNR DNE-EALF FIRM THEODOB HAASE, OF CHEMNITZ, GERMANY .l

CARBURETOR application mea october 19, .1.929, serial no.

The object of the present invention is a carburetor wherein the novel feature is the provision of an atomi'zing chamber, vseparate from but connected to the induction( channel only through a delivery pipe. The atomizing process proper takes place in this atomizing chamber, where the coarse particles of the fuel are precipitated and a complete mixture of gases or gas and vapour ready for use in the engine is continuously maintained therein. This ensures an immediate starting of the motor when cranked, and variations of load are equalized in such a manner, that they no longer make themselves felt to any appreciable f extent, and thus a material saving in fuel is effected thereby.l y

Another .novel feature of this invention is the provision of a filter in front of the delivery pipe connecting the induction channelwith the atomizing chamber, by means of -which the heavy particles of the fuelare retained, which drop o and again join the fuel in an annular chamber surrounding the atomizing jet tube. The fact of arranging a filter in front ofthe inlet of the delivery pipe possesses a further important advantage in that itA prevents the fuel in the carburetor being lignited by backlires, because of the fact that the filter prevents the flame occurring during the backring entering 'the atomizing chamber.

The drawing illustrates the subject matter of the invention in one of its constructional forms as an example and in it, Fig. 1 shows a longitudinal section thereof, and Fig. 2 shows a section taken on line C-D of Fig. l, whilst Fig. 3 represents a section taken on line -B of Fig. 1.

W is the induction channel, I) denotes the separate atomizing chamber arranged between it and the float chamber c, the atomiz- "ing chamber being provided with a bottom depressed towards its center and also with orifices d communicating with the atmosphere. The atomizing jet tube f protrudes within the atomizingchamber b, and is surrounded by an annular chamber e which is contiguous to the atomizing chamber b and which communicates with the interior of the atomizing jet tube f by means of the orifices 400,992, and in Germany September 7, wat?.

X. A calibrated plug g restricts the lower end of the atomizing jet tube f. The delivery pipe lc leads from the atomizing chamber b into the induction channel/w where it is provided with outlet orices, and is surmounted by t-he throttle valve a. A filter Z is provided on the inlet-end of the delivery pipe within the atomizing chamber An air opening is provided at .a whereby air can be admitted from the atmosphere through the air nozzle pipe s to the interior of the atomizing chamber. This air opening is controlled by a slide-valve m and the air lnozzle pipe s has a nozzle o which is in consame, not shown in the drawing). lWhen'the carburetor float is hooded the fuel is allowed to rise into the 'atomizing chamber, though not above the level of the orices d, throu h which the fuel can escape toatmosphere. s the orifices d are at a lower level than the top of the atomizing jet tube it is of course impossible to liood the atomizing chamber completely when startin the motor.

The fuel is there ore present in the float chamber c in the atomizing chamber b in the atomizing jet tube f and in the annular chamber e which are, as already mentioned, in communication with one another by means of holes X and the calibrated nozzle o f plug g.

The calibrated nozzle of plug g restricts the lower end of the atomizing jet tube 7 and is arranged at a position far below the normal level of the fuel.

When the motor is started the suction produced is of course communicated to the atomizing. chamber b. The air at that moment i aspirated through o and a (see Fig. 2) passes over the top of the atomizing jet tube and draws the fuel from the tube to the atomizing chamber.

First of all the contents'of the atomizing jet tube f and then that of the annular chamber e are evacuated, as the orifice of theatomzing jet tube is larger than the calibrated 4nozzle of plug g. If the full amount of mixture is admitted to the engine lprocess the larger particles of fuel are caught upon the walls of the filter Z and are thereafter precipitated and flow back into the annular chamber surrounding the atomizing jet tube f. The vaporized fuel formed in the atomizing chamber b is aspirated through the filter Z and the holes of the delivery pipe k into the induction channel fw whence it flows to the motor.

Whereas, hitherto evenin the case of the best carburetor system, the fuel is vaporized or atomized directly in the induction channel, or in other words, is injected into the induction channel, the atomizing is effected in the case of the present invention within a special atomizing chamber arranged between the induction channel and the iioat chamber, and it is a fact that from this chamber only a very finely' distributed and quite dry and filtered vapour is admitted to the induction channel and to the motor cylinder.

The fuel which collects in the annular chamber e then passes through the orifices X into the vaporizing tube, to be sucked up and vaporized again. If the fuel rises in the annular chamber e owing to throttling by means of the valve, then there is ample fuel present for the next acceleration.

By adjusting the air valve min relation to the air inlet n the vaporization or atomization effect, and consequently the quantity of the vaporized fuel can be regulated, according to temperature and the like.

What I claim is: y i

In a carburetor the combination of a mixture delivery pipe provided with outlet oriiices, an atomizing chamber into which protrude gauze filters which connect the atomizing chamber with the delivery pipe and thereby. to the induction channel, a float chamber separated from the atomizing chamber by a calibrated plug, an atomizing jet tubeadapted to receive fuel from the ioat chamber through said calibrated .plug and discharging the fuel in said' atomizing chamber, an air nozzle ipe in atomizing relationship to said atomlzing jet tube,'the amount of air flowing through said air nozzle pipe being controlled by a slide valve and the direction ofthe air stream being such that it does not strike said gauze filters, the bottom of said atomizing chamber being. continued down into a cylindrical chamber through which the atomizing jet tube is carried which communicates with-said cylindrical chamber by holes and at the lower end of which said calibrated plug is mounted.

' RICHARD MALIN. 

